[OfflinePages] Fix Coordinator issue with lagging NetworkChangeNotifier

components/offline_pages/background/request_coordinator.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 285 matching lines @@
 
   // Records a completed attempt for the request and update it in the queue
   // (possibly removing it).
   void UpdateRequestForCompletedAttempt(const SavePageRequest& request,
                                         Offliner::RequestStatus status);
 
   // Returns whether we should try another request based on the outcome
   // of the previous one.
   bool ShouldTryNextRequest(Offliner::RequestStatus previous_request_status);
 
-  void TryNextRequest();
+  void TryNextRequest(bool is_start_of_processing);
 
   // If there is an active request in the list, cancel that request.
   bool CancelActiveRequestIfItMatches(const std::vector<int64_t>& request_ids);
 
   // Records an aborted attempt for the request and update it in the queue
   // (possibly removing it).
   void UpdateRequestForAbortedAttempt(const SavePageRequest& request);
 
   // Remove the attempted request from the queue with status to pass through to
   // any observers and UMA histogram.
@@ skipping 81 matching lines @@
   base::Callback<void(bool)> immediate_schedule_callback_;
   // Allows us to pass a weak pointer to callbacks.
   base::WeakPtrFactory<RequestCoordinator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestCoordinator);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_